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What Are the National Standards for Outdoor Air?

Ozone
Ozone

Carbon Monoxide
Carbon Monoxide

Nitrogen Dioxide
Nitrogen Dioxide

Sulfur Dioxide
Sulfur Dioxide

Particulate Matter
Particulate Matter

Lead
Lead

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  Why Test?

  Protection

  National Standards

  EPA

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  Regulation

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The National Ambient Air Quality Standards (or NAAQS) prescribe a level for each of the 6 criteria air pollutants that cannot be exceeded during a specific time period. Particulate matter (PM), sulfur dioxide (SO2), carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3), and lead (Pb) are strictly regulated because of their proven harmful effects on our health and the health of our environment.

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